Hmm... Gaara said that he was Going to verify his existance = kill people. Well, even he's very powerful I think he actually didn't kill them. It's true that Orochimaru wouldn't let Sasuke die, as he's willing to use him later. And as we saw in episode 63, Kakashi did feel Gaaras existence. Very well, what ever happened there, I think no-one died. Maybe Gaara changed his mind and decided not to try kill anyone after all. Who knows, maybe we'll find out what happened in the next epispode.